Originally posted by Adam Can you guess where it is before clicking on the link?
Can you guess whether the camera had an AA-filter before clicking on the link?
If you cannot see the moiré, you cannot see the additional resolution either (assuming, of course, the K-5 image has been appropriately capture-sharpened).
Originally posted by Adam I didn't shoot the same scene at F8, but I can confirm that it is gone at F13 (yet the IIs shot still out-resolved the K-5 shot).
Note that at f/13 on APS-C because of diffraction you are recording ~5MP worth of resolution (green light). There isn't a fantastic level of micro-detail that the K-5 IIs preserves. Because the image is already blurry (w.r.t. a 16MP sensor), the further AA-filter blurring will cause some loss of information. The K-5 IIs actually has a slight advantage with images that are slightly blurry to begin with. However, if you can open up the aperture, the K-5 could resolve more detail at f/5.6 than the K-5 IIs can capture at f/13.